KR101261071B1 - System and method for identifying and processing data within a data stream - Google Patents

System and method for identifying and processing data within a data stream Download PDF

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Publication number
KR101261071B1
KR101261071B1 KR1020077009741A KR20077009741A KR101261071B1 KR 101261071 B1 KR101261071 B1 KR 101261071B1 KR 1020077009741 A KR1020077009741 A KR 1020077009741A KR 20077009741 A KR20077009741 A KR 20077009741A KR 101261071 B1 KR101261071 B1 KR 101261071B1
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South Korea
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stream
header
data stream
encoded
video data
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KR1020077009741A
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Korean (ko)
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KR20070064651A (en
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존 라치월스키
데니엘 위트
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벡터맥스 코포레이션
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    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/21—Server components or server architectures
    • H04N21/218—Source of audio or video content, e.g. local disk arrays
    • H04N21/2187—Live feed
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/21—Server components or server architectures
    • H04N21/222—Secondary servers, e.g. proxy server, cable television Head-end
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/61—Network physical structure; Signal processing
    • H04N21/6106—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
    • H04N21/6125—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving transmission via Internet
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/633—Control signals issued by server directed to the network components or client
    • H04N21/6332—Control signals issued by server directed to the network components or client directed to client
    • H04N21/6334—Control signals issued by server directed to the network components or client directed to client for authorisation, e.g. by transmitting a key
    • H04N21/63345—Control signals issued by server directed to the network components or client directed to client for authorisation, e.g. by transmitting a key by transmitting keys
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
    • H04N21/84—Generation or processing of descriptive data, e.g. content descriptors

Abstract

본 시스템은 비디오 데이터 스트림 인코딩에 관한 것이다. 본 시스템은 비디오 데이터 스트림과 관련된 속성을 결정하는 제1결정기와, 제1결정기로부터 속성을 받고 스트림 신택스를 식별하는 스트림헤더를 인코딩하는 인코더를 포함한다. 스트림헤더는 마크업 언어로 인코딩된다. 멀티플렉서는 인코딩된 스트림 헤더와 비디오 데이터 스트림을 결합한다.The system relates to encoding a video data stream. The system includes a first determiner that determines an attribute associated with a video data stream and an encoder that encodes a stream header that receives an attribute from the first determiner and identifies a stream syntax. Stream headers are encoded in the markup language. The multiplexer combines the encoded stream header and the video data stream.

Description

데이터 스트림내에서 데이터를 식별하고 처리하는 시스템 및 방법{SYSTEM AND METHOD FOR IDENTIFYING AND PROCESSING DATA WITHIN A DATA STREAM}SYSTEM AND METHOD FOR IDENTIFYING AND PROCESSING DATA IN DATA STREAM {SYSTEM AND METHOD FOR IDENTIFYING AND PROCESSING DATA WITHIN A DATA STREAM}

본 명세서는 2004년 10월 5일 출원된 미국가출원 60/615,989의 정규 출원이다. 본 시스템은 비디오 데이터 인코딩에 관한 것으로서, 보다 구체적으로는 데이터 스트림내에서 데이터를 식별하고 처리하는 구성을 제공한다.This specification is a formal application of US Provisional Application 60 / 615,989, filed October 5, 2004. The system relates to video data encoding and, more particularly, provides a configuration for identifying and processing data within a data stream.

멀티미디어 데이터 스트림은 재생 응용프로그램, 통상적으로 미디어 재생 응용프로그램 수신용으로 전송될 수 있는 암호화된 비디오 데이터의 스트림이다. 멀티미디어 데이터 스트림의 전송에 앞서서, 데이터 스트림은 암호화된 비디오 데이터 프레임의 일부를 나타내는 데이터를 포함하는 다수의 패킷으로 분할된다. 스트림 자체와 각 패킷은 수신되는 스트림 및/또는 패킷에 대한 스트림 신택스를 수신 시스템에 제공하는 헤더를 포함한다. 현존하는 시스템은 이 정보를 텍스트와 이진 포맷 중 적어도 어느 하나의 포맷으로 인코딩한다. 그러나, 이런 포맷들은 쉽게 업그레이드 될 수 없고, 인코딩 포맷의 스트림을 디코딩할 수 있는 명령어를 구비한 하드코드화된 재생기를 필요로 한다는 점에서 문제가 있다. 따라서, 데이터 스트림을 디코딩하는데 사용되는 스트림의 대안물(proxy)은 임의의 변경된 스트림 신택스를 처리하기 위해 업데이트 되어야만 하고, 그렇지 않으면 실패하기 때문에 스트림 의 유연성이 감소한다.A multimedia data stream is a stream of encrypted video data that can be sent for receiving a playback application, typically a media playback application. Prior to the transmission of the multimedia data stream, the data stream is divided into a number of packets containing data representing a portion of the encrypted video data frame. The stream itself and each packet includes a header that provides the receiving system with stream syntax for the received stream and / or packet. Existing systems encode this information in at least one of text and binary formats. However, these formats cannot be easily upgraded and are problematic in that they require a hardcoded player with instructions that can decode the stream of the encoding format. Thus, the stream's flexibility is reduced because the proxy of the stream used to decode the data stream must be updated to handle any modified stream syntax, otherwise it fails.

마크업 언어는 널리 사용되는 언어인데, 이 언어는 데이터의 구성요소와 관련된 논리적 구조나 의미론을 제공하고, 또 수신된 데이터 스트림을 처리하고, 가공하고, 표시하는 방법 중 적어도 어느 하나의 방법에 관한 명령어를 시스템에 제공한다. 마크업 언어의 예들은, 하이퍼텍스트 마크업 언어(HTML), 익스텐서블 마크업 언어(XML) 그리고 스탠다드 제네랄 마크업 언어(SGML)등이 있다. 마크업 언어는 기록 또는 데이터파일의 구조 및 데이터 구성요소의 콘텐츠를 표시하기 위해 데이터 또는 디지털 데이터의 집합을 주해(annotate)하기 위한 메카니즘을 제공한다. 이 언어들은 쉽게 확장이 가능하다. 그러나, 이 언어들은 일반적으로 데이터 스트림과 관련되어 있으며, 데이터 스트림과 일체화되도록 형성되지는 않는다.A markup language is a widely used language that provides a logical structure or semantics associated with the components of the data and relates to at least one of the methods of processing, processing, and displaying the received data stream. Provide the command to the system. Examples of markup languages include Hypertext Markup Language (HTML), Extensible Markup Language (XML), and Standard General Markup Language (SGML). Markup languages provide a mechanism for annotating a collection of data or digital data to represent the structure of a record or data file and the content of data components. These languages are easily extensible. However, these languages are generally associated with data streams and are not designed to be integrated with data streams.

본 발명의 원리에 따른 시스템은 이러한 결점들과 관련된 문제들에 대해서 다룬다.The system according to the principles of the present invention addresses the problems associated with these drawbacks.

본 발명은 비디오 데이터 시스템 및 방법에 관한 것이다. 결정기는 비디오 데이터 스트림에 관련된 속성을 결정한다. 인코더는 제1결정기로부터 속성을 수신받고, 스트림 신택스을 식별하는 스트림헤드를 인코딩하는데 스트림헤더는 마크업 언어를 이용해서 인코딩된다. 멀티플렉서는 인코딩된 스트림헤더와 비디오 데이터 스트림을 결합한다.The present invention relates to video data systems and methods. The determiner determines attributes related to the video data stream. The encoder receives the attribute from the first determiner and encodes a streamhead that identifies the stream syntax, the stream header being encoded using a markup language. The multiplexer combines the encoded stream header with the video data stream.

본 발명은 인코딩된 비디오 데이터 스트림을 디코딩하는 시스템에 관한 것이다. 수신된 데이터 스트림 및 프레임의 속성을 식별하는 마크업 태그의 존재를 결정하기 위해 파서는 수신된 데이터 스트림 및 스트림헤더를 분석한다. 디코더는 수신된 데이터 스트림과 마크업 태그를 디코딩한다. 디스플레이재생기는 수신된 데이터 스트림의 식별된 속성에 대응하는 디코딩된 비디오 데이터 스트림의 디스플레이를 생성한다.The present invention relates to a system for decoding an encoded video data stream. The parser analyzes the received data streams and stream headers to determine the presence of markup tags that identify the attributes of the received data streams and frames. The decoder decodes the received data stream and markup tag. The display player produces a display of the decoded video data stream corresponding to the identified attribute of the received data stream.

본 명세서에서 사용되는 응용프로그램은 사용자의 명령 또는 입력에 대응하여 미리 정해진 기능 예를 들면, 운영 시스템, 건강 관리 정보 시스템 또는 다른 정보 처리 시스템의 기능을 포함하는 기능들을 구현하기 위한 실행 가능한 컴퓨터 프로그램이거나, 코드 또는 기계로 판독가능한 명령어를 포함하는 명령어 집합이다. 실행 가능한 처리 절차는 하나 또는 그 이상의 특정 절차를 수행하기 위한 코드의 세그먼트(명령어를 판독할 수 있는 기계), 서브루틴 그리고 실행가능한 응용프로그램의 부분이나 코드의 분명한 부분이고, 수신된 입력 파라미터에 대한 연산 수행(또는 수신된 입력 파라미터에 반응하여)을 포함할 수 있으며, 그 결과적인 출력 파라미터를 제공한다. 본 명세서에서 사용되는 프로세서는 작업들을 수행하기 위한 장치 및/또는 기계로 판독이 가능한 명령어 집합이다. 처리 장치는 하드웨어, 펌웨어, 소프트웨어의 조합중 어느 하나를 포함한다. 처리 장치는 실행가능한 절차 또는 정보 장치에 의해 사용될 정보를 조정,분석,수정,변환,전송하고 및/또는 정보를 출력 장치에 전송함으로써 정보를 처리한다. 처리장치는 예컨데 콘트롤러나 마이크로프로세서의 기능을 이용 또는 포함할 수 있다. 본 명세서에서 사용되는 멀티미디어 콘텐츠나 콘텐츠 스트림은 비디오 데이터나 오디오 데이터 중 적어도 어느 하나를 포함하는 임의의 인코딩되거나 인코딩되지 않은 데이터이다. 본 명세서에서 사용되는 프레임은 응용프로그램 데이터의 작은 단위를 나타내고, 프레임그룹은 프레임의 집단을 지칭한다.As used herein, an application program is an executable computer program for implementing functions corresponding to a user's command or input, for example, a function including an operating system, a health care information system, or another information processing system. , A set of instructions containing code or machine readable instructions. An executable processing procedure is a segment of code (a machine capable of reading instructions), a subroutine, and an obvious part of the code or executable part of the code for performing one or more specific procedures, Perform computations (or in response to received input parameters) and provide the resulting output parameters. As used herein, a processor is a device and / or machine readable set of instructions for performing tasks. The processing device includes any one of a combination of hardware, firmware and software. The processing device processes the information by adjusting, analyzing, modifying, converting, transmitting and / or transmitting the information to the output device for use by the executable procedure or information device. The processing device may, for example, utilize or include the functionality of a controller or microprocessor. As used herein, multimedia content or content stream is any encoded or unencoded data that includes at least one of video data or audio data. As used herein, a frame refers to a small unit of application data, and a frame group refers to a group of frames.

멀티미디어 데이터는 다수의 서로 다른 유형의 인코딩 방법을 이용하여 인코딩되고 압축될 수 있다. 인코딩 방법의 선택은 비디오 데이터를 수신하고 처리하는 응용프로그램에 따라 변화한다. 상기 시스템은 독점 인코딩 포맷을 사용하여 인코딩되는 멀티미디어 테이터 스트림이고, 그에 따라 비디오 스트림은 각 프레임 그룹으로 분할되며, 이때 각 프레임 그룹은 다수의 개별 비디오 프레임으로부터 형성된다. 프레임 그룹과 그 그룹을 형성하는 프레임의 구조는 사용되는 코딩 방법을 기반으로 결정된다. 본 명세서에서 사용되는 데이터 스트림은 시스템 스트림으로 알려질 것이고, 도1은 예시적인 시스템 스트림(20)을 도시한다.Multimedia data may be encoded and compressed using a number of different types of encoding methods. The choice of encoding method varies depending on the application that receives and processes the video data. The system is a multimedia data stream that is encoded using a proprietary encoding format, whereby the video stream is divided into respective frame groups, where each frame group is formed from a plurality of individual video frames. The frame group and the structure of the frames forming the group are determined based on the coding method used. The data stream as used herein will be known as a system stream, and FIG. 1 shows an example system stream 20.

각 시스템 스트림(20)은 스트림헤더(22)와 다수의 프레임그룹(26,28)을 포함한다. 스트림헤더(22)는 XML과 같은 마크업 언어를 이용하여 인코딩된다. 상기 스트림헤더(22)는 임베드된 데이터 스트림과 관련된 적어도 하나의 스트림 속성을 기술하는 마크업 언어로 인코딩된 문서이다. 상기 스트림헤더(22)에 기술된 각각의 스트림 속성은 적어도 하나의 데이터를 식별하는 마크업 언어 태그에 의해 표시되며, 각각의 속성을 나타내는 데이터 처리에 관한 명령어를 제공한다. 이런 스트림 속성은 집합적으로 미디어 재생 응용프로그램에 의해 판독이 가능하고 상기 미디어 재생 응용프로그램에 수신된 스트림 데이터를 처리하는 법에 관한 명령어를 제공하는데 필요한 스트림 신택스를 정의한다. 예를 들면, 상기 스트림헤더는 수신된 데이터 스트림을 디코딩하는 적당한 디코더를 초기화하기 위한 정보를 제공할 수 있다. 적절한 명령어가 없거나 또는 데이터 스트림이 미디어 응용프로그램에 의해 판독이 불가능한 헤더를 포함하고 있다면, 미디어 재생 응용프로그램은 작동되지 않고, 데이터 스트림은 디코딩되지 못할 것이다. 그러므로, 미디어 재생 응용프로그램에는 각각의 마크업 언어 태그가 어떻게 처리될 것인가에 관한 명령어의 집합이 제공되어야 한다.Each system stream 20 includes a stream header 22 and a plurality of frame groups 26 and 28. Stream header 22 is encoded using a markup language such as XML. The stream header 22 is a document encoded in a markup language that describes at least one stream attribute associated with an embedded data stream. Each stream attribute described in the stream header 22 is represented by a markup language tag that identifies at least one data, and provides instructions for data processing indicative of each attribute. These stream attributes collectively define stream syntax that is readable by a media playback application and is required to provide instructions to the media playback application on how to process the received stream data. For example, the stream header may provide information for initializing a suitable decoder for decoding the received data stream. If there is no proper instruction or if the data stream contains a header that cannot be read by the media application, the media playback application will not run and the data stream will not be decoded. Therefore, the media playback application must be provided with a set of instructions as to how each markup language tag will be processed.

스트림 속성 데이터를 인코딩하기 위해 마크업 언어를 사용하는 것은 유용하다. 마크업 언어는 그것이 나타내는 데이터에 대한 새로운 특징과 기능을 통합할 수 있도록 쉽게 확장이 가능하다. 임의의 원하는 스트림 속성도 스트림헤더(22)내에서 인코딩될 수 있다. 이것은 데이터 스트림 포맷의 장래 확장과 전개(deployment)를 돕는다. 또한, XML로 된 스트림 신택스을 제공하는 시스템 스트림은, 미디어 재생 응용프로그램이 알려진 태그로 표현된 정보는 수신하여 디코딩하고, 알려지지 않은 태그로 표현된 정보는 무시할 수 있게 해준다. 그러므로, 그 정보와 함께 관련된 알려지지 않은 명령 정보의 디코딩을 시도하면 미디어 재생 응용프로그램은 실패하지 않을 것이다. 스트림 속성은 높이, 너비, 비트 전송율, 프레임 전송률, 스트림 크기 그리고 스트림 주기 등을 포함하지만, 이에 한정되지는 않는다.It is useful to use markup languages to encode stream attribute data. Markup languages can be easily extended to incorporate new features and functionality for the data they represent. Any desired stream attribute can also be encoded in stream header 22. This helps in future expansion and deployment of the data stream format. In addition, system streams that provide stream syntax in XML allow a media playback application to receive and decode information represented by known tags, and to ignore information represented by unknown tags. Therefore, attempting to decode unknown command information associated with that information will not cause the media playback application to fail. Stream attributes include, but are not limited to, height, width, bit rate, frame rate, stream size, and stream period.

도1은 본 발명의 원리에 따라 다수의 형태를 가지는 헤더를 포함하는 데이터 스트림을 나타낸 도면.1 illustrates a data stream comprising a header having multiple forms in accordance with the principles of the present invention;

도2는 본 발명의 원리에 따라 인코딩된 헤더를 나타내는 블록도.2 is a block diagram illustrating a header encoded according to the principles of the present invention.

도3은 본 발명의 원리에 따라 데이터 스트림 인코더를 나타내는 블록도.3 is a block diagram illustrating a data stream encoder in accordance with the principles of the present invention.

도4는 본 발명에 따라 인코더의 동작을 설명하는 순서도.4 is a flow chart illustrating the operation of an encoder in accordance with the present invention.

도5는 본 발명에 원리에 따라 미디어 재생 응용프로그램의 블록도.5 is a block diagram of a media playback application in accordance with the principles of the present invention.

도6은 본 발명의 원리에 따라 미디어 재생 응용프로그램의 동작을 설명하는 순서도.Figure 6 is a flow chart illustrating the operation of a media playback application in accordance with the principles of the present invention.

도1의 데이터 스트림은 제1프레임그룹(26)과 제2프레임그룹(28) 2개의 프레임그룹을 포함한다. 각 프레임그룹(26,28)은 각각 다수의 개별 프레임을 포함한다. 제1프레임그룹(26)은 3개의 프레임(26A,26B,26C)을 포함하고, 제2프레임그룹(28)은 2개의 프레임(28A,28B)을 포함한다. 본 명세서에서 보여지는 스트림은 단지 설명을 위한 목적에 불과할 뿐, 데이터 스트림(20)은 데이터 스트림(20)을 인코딩하는데 사용하는 코딩에 따라 결정되는 임의의 개수의 개별적 프레임으로 형성된 임의의 개수의 프레임그룹을 포함할 수 있다. 각 프레임그룹은 그와 관련된 적어도 하나의 프레임그룹 속성을 가진다. 시스템 스트림(20)은 다수의 세그멘트헤더(24)를 제공하고 각 세그먼트헤더(24)는 각 프레임그룹의 첫번째 개별 프레임 바로 앞에 위치한다. 스트림헤더(22)와 유사하게, 세그먼트헤더(24)는 적어도 하나의 스트림 속성에 대응하는 정보를 포함하는 마크업 언어로 인코딩된 문서이다. 프레임그룹 속성은 프레임그룹의 유형, 즉 키(I)프레임그룹이나 델타(P)프레임그룹, 그룹 길이, 그룹 순서 번호 등을 포함하지만, 이에 한정되지는 않는다.The data stream of FIG. 1 includes two frame groups, a first frame group 26 and a second frame group 28. Each frame group 26, 28 includes a plurality of individual frames, respectively. The first frame group 26 includes three frames 26A, 26B and 26C, and the second frame group 28 includes two frames 28A and 28B. The streams shown herein are for illustrative purposes only, and the data stream 20 is any number of frames formed of any number of individual frames determined by the coding used to encode the data stream 20. It can include a group. Each framegroup has at least one framegroup attribute associated with it. System stream 20 provides a number of segment headers 24 and each segment header 24 is located immediately before the first individual frame of each frame group. Similar to stream header 22, segment header 24 is a document encoded in a markup language that includes information corresponding to at least one stream attribute. Frame group attributes include, but are not limited to, the type of frame group, i.e., key (I) frame group or delta (P) frame group, group length, group sequence number, and the like.

스트림헤더(22)와 세그멘트헤더(24)는 속성 정보를 나타낸다. 이 헤더 들(22,24)은 패킷이나 데이터그램의 프레이밍과 시퀀싱에 관한 정보를 포함하는 패킷 또는 데이터그램 헤더와 동등하지 않다. 대조적으로, 스트림헤더(22)와 패킷헤더(24)는 패킷이나 데이터그램과 별개인 데이터 시스템(20)에 임베드되고, 미디어 재생 응용프로그램에 데이터 스트림을 처리하고 사용하는 법에 대한 정보를 제공한다.The stream header 22 and the segment header 24 represent attribute information. These headers 22 and 24 are not equivalent to packet or datagram headers that contain information about the framing and sequencing of the packet or datagram. In contrast, stream header 22 and packet header 24 are embedded in data system 20 separate from the packet or datagram and provide information to the media playback application about how to process and use the data stream. .

각 데이터스트림과 프레임그룹의 속성은 프레임 데이터와 함께 응용프로그램 인터페이스를 통해 전달된다. XML 인코더는 속성을 분석하고 속성에서의 변화를 검출한다. 속성의 변화를 탐지하면 인코더는 스트림헤더(22) 또는 세그먼트헤더(24)를 인코딩하고, 관련 있는 변화가 탐지되는 때에 마크업 언어 태그를 삽입한다. 일부의 스트림 속성은 연산자에 의해서 간접적으로 특정된다. 예를 들면, 연산자가 비디오는 320×240 픽셀로 인코딩된다고 특정하면, 이 파라미터는 스트림헤더로 인코딩될 것이다. 스트림 신택스로의 어떤 업그레이드도 헤더내의 새로운 태그로 나타날 것이다.The attributes of each data stream and frame group are passed along with the frame data through the application program interface. The XML encoder analyzes the attribute and detects a change in the attribute. Upon detecting a change in the attribute, the encoder encodes the stream header 22 or segment header 24 and inserts a markup language tag when a relevant change is detected. Some stream attributes are specified indirectly by operators. For example, if the operator specifies that the video is encoded 320 x 240 pixels, this parameter will be encoded into the stream header. Any upgrade to the stream syntax will appear as a new tag in the header.

도2는 예시적인 스트림헤더(22)이다. 각 스트림헤더(22)와 세그먼트헤더(24)의 포맷은 동일하고, 헤더와 관련된 데이터 스트림이나 프레임그룹을 기술하기 위한 각 헤더(22,24)내에서 설명될 속성의 수에 직접적으로 의존한다. 스트림헤더(22)는 헤더로서 인코딩되는 문서를 식별하는 마크업 언어 태그를 포함하는 오프닝 필드(12)를 포함한다. 스트림헤더(22)는 헤더가 위치하는 데이터 스트림을 기술하는 속성에 대응하는 정보를 가지고 있는 다수의 속성 필드(14)를 더 포함한다. 제1 속성 필드(14A)는 첫번째 속성을 나타내는 데이터를 나타내는 제1 마크업 언어 태그를 포함한다. 제2 속성 필드(14B), 제3 속성 필드(14C) 그리고 제4 속성 필드(14D) 각각은 도1에 도시한 바와 같은 데이터스트림(20)의 추가적인 속성을 나타내는 데이터를 표시하는 마크업 언어 태그를 포함한다. 스트림헤더(22)는 헤더(22)가 종료되고 더 이상 추가적인 정보가 없음을 표현하는 마크업 언어가 포함된 클로즈 필드(16)를 포함한다.2 is an exemplary stream header 22. The format of each stream header 22 and segment header 24 is the same and directly depends on the number of attributes to be described in each header 22, 24 for describing a data stream or frame group associated with the header. Streamheader 22 includes an opening field 12 that includes a markup language tag that identifies the document to be encoded as a header. The stream header 22 further includes a plurality of attribute fields 14 having information corresponding to attributes describing the data stream in which the header is located. The first attribute field 14A includes a first markup language tag that represents data representing the first attribute. Each of the second attribute field 14B, the third attribute field 14C, and the fourth attribute field 14D is a markup language tag representing data representing additional attributes of the data stream 20 as shown in FIG. It includes. The stream header 22 includes a close field 16 that includes a markup language that indicates that the header 22 has ended and there is no more information.

도3은 본 시스템의 인코더를 나타내는 블록도이다. 미리 정해진 코딩 방법을 이용하여 인코딩된 비디오 데이터 소스(30)가 제공된다. 인코딩된 비디오 데이터가 제1결정기(34)와 제2결정기(36) 그리고 멀리플렉서(42) 각각에 제공된다. 제1결정기(34)는 인코딩된 데이터 스트림을 조사하고, 비디오 데이터 스트림과 관련된 속성을 결정하며, 결정된 속성을 제1헤더 인코더(38)에 제공한다. 제1헤더 인코더(38)는 마크업 언어를 이용하여 결정된 스트림 속성에 대응하는 스트림 신택스을 설명하는 스트림 헤더를 인코딩한다. 제2결정기(36)는 데이터 스트림을 형성하는 프레임그룹을 분석하고, 데이터 스트림내에서 각 프레임그룹과 관련된 속성을 결정한다. 결정된 프레임그룹의 속성은 마크업 언어를 이용하여 결정된 스트림 속성에 응답하여 스트림 그룹 신택스를 설명하는 프레임그룹 헤더를 인코딩하는 제2헤더 인코더(40)에 제공된다. 제1헤더 인코더(38)와 제2헤더 인코더(40)는 헤더들과 비디오 데이터 스트림을 결합하는 멀티플렉서(42)에 인코딩된 스트림과 프레임그룹 헤더를 제공한다. 멀티플렉스된 비디오 데이터 스트림은 데이터 스트림을 전송 가능한 패킷으로 분할하는 분할기(44)로 제공된다. 전송가능한 패킷은 패킷을 브로드캐스트하는 브로드캐스터(46)에 제공된다.3 is a block diagram showing an encoder of the present system. A video data source 30 encoded using a predetermined coding method is provided. The encoded video data is provided to each of the first determiner 34, the second determiner 36, and the multiplexer 42. First determiner 34 examines the encoded data stream, determines attributes associated with the video data stream, and provides the determined attributes to first header encoder 38. The first header encoder 38 encodes a stream header that describes the stream syntax corresponding to the stream attribute determined using the markup language. The second determiner 36 analyzes the frame groups forming the data stream and determines the attributes associated with each frame group in the data stream. The determined attribute of the framegroup is provided to a second header encoder 40 which encodes a framegroup header that describes the stream group syntax in response to the stream attribute determined using the markup language. The first header encoder 38 and the second header encoder 40 provide the encoded stream and framegroup header to a multiplexer 42 that combines the headers and the video data stream. The multiplexed video data stream is provided to a divider 44 which divides the data stream into transportable packets. The transmittable packet is provided to a broadcaster 46 which broadcasts the packet.

도4는 본 시스템에 의해 수행되는 인코딩 동작을 설명하는 순서도이다. 비디오 데이터 스트림이 결정기에 제공된다(S400). 결정기에서는 제공된 데이터 스트림을 나타내는 속성들이 결정된다(S402). 인코더는 결정된 스트림 속성에 응답하여 스트림 헤더를 인코딩한다(S404). 단계 S404는 XML과 같은 마크업 언어를 이용하여 수행된다. 단계 S404에서의 인코딩된 스트림헤더는 다수의 속성 필드을 포함하는데, 그 속성 필드의 수는 단계 S402에서 결정된 스트림 속성의 수와 직접적으로 관련되어 있다. 비디오 스트림으로부터 데이터 스트림내의 프레임그룹의 존재하는지 여부에 관한 추가적인 결정이 행해진다. 만약 존재하지 않으면, 후술하는 단계 S412의 절차를 수행하게 된다. 만약 프레임 내에 프레임그룹이 존재하면, 제2결정기는 스트림내의 각 프레임과 관련된 속성을 결정한다(S408). 단계 S408에서의 결정에 대응하여, 프레임그룹의 각각에 대한 세그먼트헤더가 인코딩된다(S410). 스트림헤더와 유사하게 세그먼트헤더도 다수의 속성 필드을 포함하는데, 그 속성 필드의 수는 단계 S408에서 결정된 프레임그룹의 속성의 수와 직접적으로 관련되어 있다. 비디오 데이터 스트림은 다음에 설명할 도5와 도6에 도시된 미디어 재생 응용프로그램이 수신할 수 있도록 처리 및 전송될 스트림헤더와 세그먼트헤더 각각과 결합된다(S412). 단계 S412의 동안에는, 스트림헤더는 어떠한 프레임헤더보다 앞에서 삽입되고, 세그먼트헤더는 세그먼트헤더와 관련된 각각의 프레임그룹 바로 앞에서 삽입된다.4 is a flowchart illustrating an encoding operation performed by the present system. The video data stream is provided to the determiner (S400). In the determiner, attributes representing the provided data stream are determined (S402). The encoder encodes the stream header in response to the determined stream attribute (S404). Step S404 is performed using a markup language such as XML. The encoded stream header in step S404 includes a number of attribute fields, the number of which is directly related to the number of stream attributes determined in step S402. Additional determinations are made as to whether a framegroup exists in the data stream from the video stream. If not present, the procedure of step S412 described below is performed. If there is a frame group in the frame, the second determiner determines an attribute associated with each frame in the stream (S408). Corresponding to the determination in step S408, the segment header for each of the framegroups is encoded (S410). Similar to the stream header, the segment header also includes a plurality of attribute fields, the number of which is directly related to the number of attributes of the frame group determined in step S408. The video data stream is combined with the stream header and the segment header, respectively, to be processed and transmitted so that the media playback application shown in Figs. During step S412, the stream header is inserted before any frame header, and the segment header is inserted just before each frame group associated with the segment header.

도5는 다수의 패킷(48)을 수신하는 미디어 재생 응용프로그램(50)의 블록도이다. 미디어 재생 응용프로그램(50)은 수신기(52), 파서(54), 제1디코더(56), 제2 디코더(58), 태그표(55) 및 디스플레이발생기(60)를 포함한다. 수신기(52)는 도3에서 도시된 브로드캐스터에 의해 브로드캐스터된 패킷 소스(48)를 수신한다. 컴파일러(53)는 수신된 패킷을 컴파일하여 다수의 프레임을 포함하는 데이터 스트림을 형성한다. 전송계층은 디코딩에 앞서서, 스트림헤더와 세그먼트헤더를 별개의 헤더로 취급한다. 파서(54)는 수신된 데이터 스트림을 파싱하고, 스트림헤더와 세그멘트헤더 중 적어도 하나 이상을 분석한다. 이러한 분석은 스트림 속성과 프레임그룹 속성을 식별하는 마크업 태그의 존재를 결정한다. 각 태그의 값은 태그표(55)에 저장된다. 태그표(55)에서의 값은 디코더(56,58)로 제공된다. 디코더는 디코더에 의해 수행되는 기능을 시작하도록 명령어가 태그에 포함되어 있는지 여부를 판단하기 위해 헤더내의 태그를 리뷰하고, 표의 엔트리를 조사한다. 스트림내에 있는 데이터스트림이나 프레임그룹 중 적어도 하나 이상의 속성을 결정한 후에, 제1디코더(56)와 제2디코더(58) 중 하나 또는 모두는 수신된 데이터 스트림의 디코딩을 개시한다. 디코딩된 스트림은 미디어 재생 응용프로그램을 통해 데이터 스트림을 출력하는 디스플레이를 생성하는 디스플레이생성기(60)에 제공된다. 디스플레이생성기(60)는 파서(54)와 통신할 수 있으며, 스트림헤더나 세그먼트헤더 내의 각각의 마크업 태그에 관련된 데이터에 응답하여 동작할 수도 있다.5 is a block diagram of a media playback application 50 that receives a number of packets 48. The media playback application 50 includes a receiver 52, a parser 54, a first decoder 56, a second decoder 58, a tag table 55 and a display generator 60. Receiver 52 receives a packet source 48 broadcast by the broadcaster shown in FIG. Compiler 53 compiles the received packets to form a data stream comprising a number of frames. Prior to decoding, the transport layer treats the stream header and the segment header as separate headers. Parser 54 parses the received data stream and analyzes at least one of the stream header and the segment header. This analysis determines the presence of markup tags that identify stream attributes and framegroup attributes. The value of each tag is stored in the tag table 55. The values in tag table 55 are provided to decoders 56 and 58. The decoder reviews the tag in the header and examines the entries in the table to determine whether the command is included in the tag to begin the function performed by the decoder. After determining at least one attribute of the data stream or frame group in the stream, one or both of the first decoder 56 and the second decoder 58 initiate decoding of the received data stream. The decoded stream is provided to a display generator 60 that produces a display that outputs a data stream via a media playback application. Display generator 60 may communicate with parser 54 and may operate in response to data associated with each markup tag in a stream header or segment header.

도6은 도5에 도시된 미디어 재생 응용프로그램의 동작을 상세하게 설명하는 순서도이다. 미디어 재생 응용프로그램은 수신기를 통해 인코딩된 데이터 스트림을 형성하는 다수의 패킷을 수신한다(S600). 데이터 스트림은 파싱되고 스트림헤더와 세그먼트헤더 각각이 분석된다(S602). 파서는 전체 데이터 스트림의 속성을 식별하 는 마크업 태그가 존재하는지를 결정하고(S604), 발견된 마크업 태그에 응답하여 어떻게 데이터 스트림을 디코딩될 것인지에 대한 각각의 구성요소에 명령어를 제공한다(S606). 데이터 스트림이 프레임그룹을 포함하는지 여부가 결정된다(S608). 만약 포함되어 있지 않다면, 절차는 후술하는 단계 S614를 계속한다. 만약 포함되어 있다면, 파서는 각 프레임그룹과 관련된 속성을 나타내는 마크업 태그에 대한 세그먼트헤더를 분석한다. 발견된 마크업 태그를 이용해서 데이터 스트림의 프레임그룹을 디코딩하는 구성요소에 세그먼트헤더로부터 명령어가 제공된다(S610). 스트림과 각 프레임그룹의 디코딩에 응답하여, 디코딩된 스트림이 미디어 재생 응용프로그램을 이용하여 디스플레이를 생성하는 디스플레이생성기에 제공된다.FIG. 6 is a flowchart for explaining the operation of the media playback application shown in FIG. The media playback application receives a plurality of packets forming an encoded data stream through the receiver (S600). The data stream is parsed and each of the stream header and the segment header is analyzed (S602). The parser determines whether a markup tag exists that identifies the attributes of the entire data stream (S604) and provides instructions to each component of how the data stream will be decoded in response to the found markup tag (S606). ). It is determined whether the data stream includes the frame group (S608). If it is not included, the procedure continues with step S614 described later. If included, the parser parses the segment header for markup tags that represent the attributes associated with each framegroup. An instruction is provided from the segment header to a component that decodes a framegroup of a data stream using the found markup tag (S610). In response to the decoding of the stream and each framegroup, the decoded stream is provided to a display generator that generates a display using a media playback application.

스트림 버젼 포맷으로의 업그레이드는 명백하고 쉽게 달성될 수 있다. 왜냐하면, 다수의 미디어 재생 응용프로그램으로의 새로운 스트림 디토딩 구성요소들의 주요 전개가 있을 필요가 없기 때문이다. 미디어 재생 응용프로그램은 익숙한 마크업 신호 태그를 단지 분석하고 이용할 것이므로, 마크업 언어는 현존하는 미디어 재생기가 새로운 스트림 버젼을 디코딩할 수 있도록 해준다.Upgrading to the stream version format can be accomplished clearly and easily. This is because there is no need for major deployment of new stream detoding components into multiple media playback applications. Since the media playback application will only analyze and use the familiar markup signal tags, the markup language allows existing media players to decode new stream versions.

따라서, 주석달기, 동기화된 미디어 사건 데이터 또는 어떠한 다른 속성과 같은 추가적인 유형의 데이터라도 이전에 배치했던 구성요소를 그대로 사용하여 스트림 신택스에 선택적으로 추가될 수 있다.Thus, additional types of data, such as annotations, synchronized media event data, or any other attribute, can optionally be added to the stream syntax using the previously deployed component as is.

Claims (14)

전체 비디오 데이터 스트림과 관련된 특성을 나타내는 속성을 결정하는 제1결정기;A first determiner for determining attributes indicative of characteristics associated with the entire video data stream; 상기 제1결정기로부터 속성을 수신하고, 결정된 속성을 포함하는 스트림 신택스를 식별하는 스트림 헤더를 인코딩하는 인코더로, 상기 스트림 헤더는 마크업 언어로 인코딩되고 전체 비디오 데이터 스트림의 처리를 위한 지시를 제공하는, 인코더; 및An encoder that receives an attribute from the first determiner and encodes a stream header that identifies a stream syntax that includes the determined attribute, wherein the stream header is encoded in a markup language and provides instructions for processing the entire video data stream. , Encoder; And 전체 인코딩된 비디오 데이터 스트림 내에 인코딩된 스트림 헤더를 내장하여, 상기 인코딩된 스트림 헤더를 상기 전체 비디오 데이터 스트림과 결합하는 멀티플렉서를 포함하는 비디오 데이터 스트림 인코딩 시스템.And a multiplexer for embedding an encoded stream header within an entire encoded video data stream to combine the encoded stream header with the entire video data stream. 제1항에 있어서,The method of claim 1, 데이터 스트림내의 프레임그룹과 관련된 속성을 결정하는 제2결정기를 더 포함하는 비디오 데이터 스트림 인코딩 시스템.And a second determiner for determining an attribute associated with a framegroup in the data stream. 전체 비디오 데이터 스트림과 관련된 특성을 나타내는 속성을 결정하는 제 1 결정기;A first determiner for determining an attribute indicative of a characteristic associated with the entire video data stream; 데이터 스트림 내의 프레임 그룹과 관련된 속성을 결정하는 제 2 결정기;A second determiner for determining an attribute associated with a group of frames in the data stream; 상기 제 1 및 제 2 결정기로부터 속성을 수신하고, 결정된 속성을 포함하는 스트림 신택스를 식별하는 스트림 헤더를 인코딩하는 인코더로, 상기 스트림 헤더는 마크업 언어로 인코딩되고 전체 비디오 데이터 스트림의 처리를 위한 지시를 제공하는, 인코더; 및An encoder that receives an attribute from the first and second determiners and encodes a stream header that identifies a stream syntax that includes the determined attribute, the stream header encoded in a markup language and directed for processing of the entire video data stream. An encoder; And 전체 인코딩된 비디오 데이터 스트림 내에 인코딩된 스트림 헤더를 내장하여, 상기 인코딩된 스트림 헤더를 상기 비디오 데이터 스트림과 결합하는 멀티플렉서를 포함하고,Embedding an encoded stream header within an entire encoded video data stream, the multiplexer for combining the encoded stream header with the video data stream, 상기 인코더는, 데이터 스트림의 각각의 프레임 그룹에 대한 프레임 그룹 신택스를 식별하는 결정된 속성을 포함하는 세그먼트 헤더를 마크업 언어로 인코딩하는 것을 특징으로 하는 비디오 데이터 스트림 인코딩 시스템.Wherein the encoder encodes, in a markup language, a segment header that includes a determined attribute that identifies a frame group syntax for each frame group of the data stream. 제3항에 있어서,The method of claim 3, 상기 마크업 언어는 XML인 것을 특징으로 하는 비디오 데이터 스트림 인코딩 시스템.And the markup language is XML. 제3항에 있어서, The method of claim 3, 상기 멀티플렉서는 인코딩된 스트림헤더를 데이터스트림의 페이로드의 앞에 위치시키고, 상기 페이로드는 모든 프레임그룹을 포함하는 것을 특징으로 하는 비디오 데이터 스트림 인코딩 시스템.And said multiplexer places an encoded stream header in front of the payload of the data stream, said payload comprising all framegroups. 제5항에 있어서,The method of claim 5, 상기 멀티플렉서는 데이터 스트림내의 인코딩된 세그먼트헤더를 각 프라임그룹의 앞에 위치시키는 것을 특징으로 하는 비디오 데이터 스트림 인코딩 시스템.And wherein the multiplexer places an encoded segment header in the data stream in front of each prime group. 전체 비디오 데이터 스트림과 관련된 특성을 나타내는 속성을 결정하는 제1결정기;A first determiner for determining attributes indicative of characteristics associated with the entire video data stream; 상기 제1결정기로부터 속성을 수신하고, 결정된 속성을 포함하는 스트림 신택스를 식별하는 스트림 헤더를 인코딩하는 인코더로, 상기 스트림 헤더는 마크업 언어로 인코딩되는, 인코더; An encoder that receives an attribute from the first determiner and encodes a stream header that identifies a stream syntax that includes the determined attribute, the stream header encoded in a markup language; 상기 인코딩된 스트림 헤더를 상기 비디오 데이터 스트림과 결합하는 멀티플렉서; 및A multiplexer for combining the encoded stream header with the video data stream; And 데이터 스트림을 전송 가능한 패킷으로 분할하는 분할기를 포함하는 것을 특징으로 하는 비디오 데이터 스트림 인코딩 시스템.And a divider for dividing the data stream into transportable packets. 비디오 데이터 스트림과 관련된 속성을 결정하는 제1결정기;A first determiner for determining an attribute associated with a video data stream; 상기 제1결정기로부터 속성을 수신하고, 스트림 신택스를 식별하는 스트림 헤더를 인코딩하는 인코더로, 상기 스트림 헤더는 마크업 언어로 인코딩되고 전체 비디오 데이터 스트림의 처리를 위한 지시를 제공하는, 인코더; 및An encoder that receives an attribute from the first determiner and encodes a stream header that identifies a stream syntax, the stream header encoded in a markup language and providing instructions for processing the entire video data stream; And 전체 인코딩된 비디오 데이터 스트림 내에 인코딩된 스트림 헤더를 내장하여, 상기 인코딩된 스트림 헤더를 상기 비디오 데이터 스트림과 결합하는 멀티플렉서를 포함하며,Embedding an encoded stream header within an entire encoded video data stream, the multiplexer for combining the encoded stream header with the video data stream, 상기 스트림 헤더는 복수의 필드들을 포함하고, 각각의 필드는 상기 결정된 스트림 속성 중 하나를 정의하는 것을 특징으로 하는 비디오 데이터 스트림의 인코딩 시스템.The stream header includes a plurality of fields, each field defining one of the determined stream attributes. 제3항에 있어서,The method of claim 3, 상기 세그먼트헤더 각각은 복수의 필드들을 포함하고, 각각의 필드는 상기 결정된 프레임그룹 속성 중 하나를 정의하는 것을 특징으로 하는 비디오 데이터 스트림 인코딩 시스템.Each of the segment headers comprises a plurality of fields, each field defining one of the determined framegroup attributes. 전체 비디오 데이터 스트림과 관련된 특성을 나타내는 속성을 결정하는 단계;Determining an attribute indicative of a characteristic associated with the entire video data stream; 상기 결정된 스트림 속성을 포함하고 이를 기반으로 하는 스트림 신택스를 식별하는 스트림 헤더를 인코딩하는 단계로, 상기 스트림 헤더는 마크업 언어로 인코딩되고 전체 비디오 데이터 스트림의 처리를 위한 지시를 제공하는, 단계; 및Encoding a stream header containing the determined stream attribute and identifying a stream syntax based thereon, wherein the stream header is encoded in a markup language and provides instructions for processing the entire video data stream; And 전체 인코딩된 비디오 데이터 스트림 내에 인코딩된 스트림 헤더를 내장하여, 상기 인코딩된 스트림 헤더를 상기 전체 비디오 데이터 스트림과 결합하는 단계를 포함하는 비디오 데이터 스트림 인코딩 방법.Embedding an encoded stream header within an entire encoded video data stream to combine the encoded stream header with the entire video data stream. 제10항에 있어서,The method of claim 10, 상기 마크업 언어는 XML인 것을 특징으로 하는 비디오 데이터 스트림 인코딩 방법.And the markup language is XML. 비디오 데이터 스트림과 관련된 속성을 결정하는 단계;Determining an attribute associated with the video data stream; 상기 결정된 스트림 속성을 기반으로 스트림 신택스를 식별하는 스트림 헤더를 인코딩하며, 상기 스트림 헤더는 마크업 언어로 인코딩되는 단계; Encoding a stream header identifying a stream syntax based on the determined stream attribute, wherein the stream header is encoded in a markup language; 데이터 스트림 내의 각각의 프레임 그룹과 관련된 속성을 결정하는 단계; Determining an attribute associated with each group of frames in the data stream; 각각의 프레임 그룹의 프레임 그룹 신택스를 정의하는 세그먼트 헤더를 인코딩하는 단계; 및Encoding a segment header that defines a frame group syntax of each frame group; And 상기 인코딩된 스트림 헤더 및 세그먼트 헤더를 상기 비디오 데이터 스트림과 결합하는 단계를 포함하는 비디오 데이터 스트림 인코딩 방법.Combining the encoded stream header and segment header with the video data stream. 삭제delete 삭제delete
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